diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index 059d2924b57f..ef37586cf5bd 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -672,8 +672,7 @@ def same_attributes?(other)
 
   def hash # :nodoc:
     @@attributes.inject(0) { |hash_code, (name, default_value)|
-      n = self.send(name).hash
-      hash_code + n
+      hash_code ^ self.send(name).hash
     }
   end